Fuzzy sets and fuzzy logic in multi-criteria decision making. the 50th anniversary of prof. lotfi zadeh's theory: Introduction Herrera Viedma, Enrique 2020-12-15T12:49:53Z 2020-12-15T12:49:53Z 2015 journal article Herrera-Viedma, E. (2015). Fuzzy sets and fuzzy logic in multi-criteria decision making. the 50th anniversary of prof. lotfi zadeh's theory: Introduction. Technological and Economic Development of Economy, 21(5), 677-683. doi:10.3846/20294913.2015.1084956 http://hdl.handle.net/10481/64924 10.3846/20294913.2015.1084956 eng http://creativecommons.org/licenses/by/3.0/es/ open access Atribución 3.0 España VILNIUS GEDIMINAS TECH UNIV